\begin{tikzpicture}
	\begin{scope}
		\tkzDefPoint(0,0){O}
		\tkzDefPoint(0:1.5){A}
		\tkzDefPoint(120:1.5){B}
		\tkzDrawSegments[thick](O,A  O,B)
	\end{scope}

	\begin{scope}[xshift=2.5cm]
		\tkzDefPoint(0,0){O}
		\tkzDefPoint(0:1.5){A}
		\tkzDefPoint(45:1.5){B}
		\tkzDrawSegments[thick](O,A  O,B)
	\end{scope}
\end{tikzpicture}

